View in EDS

The impact of fullerenes on the ordering of polyacrylonitrile during nanocomposites formation.

Saved in:
Bibliographic Details
Title: The impact of fullerenes on the ordering of polyacrylonitrile during nanocomposites formation.
Authors: Imel, Adam E.1, Dadmun, Mark D.1,2 Dad@utk.edu
Source: Polymer. Sep2015, Vol. 75, p134-140. 7p.
Subjects: Fullerenes, Polyacrylonitriles, Nanocomposite materials, X-ray scattering, Molecular self-assembly
Abstract: The production of polymer nanocomposites from solution consists of the mixing of the polymer and nanoparticle in solution and subsequent evaporation of the solvent. We examine the formation of polyacrylonitrile and C 60 fullerene nanocomposites, with a focus on monitoring these two steps. The results of this study indicate that the nanoparticles are individually dispersed with the polymer chains in solution prior to deposition and in the final film. As the solution becomes more concentrated, the nanoparticles are sequestered to the outer edges of the polymer crystals, altering the detected crystal structure. The self-assembled structure of the crystalline polymer is directed by the addition of C 60 and manifests itself as a peak in small-angle X-ray scattering on a length scale of ∼150 Å. The results suggest that the non-covalent molecular interactions between C 60 and polyacrylonitrile matrix are sufficiently strong to alter the self-assembled morphology of the polymer and the meso- and nanoscale structures in the nanocomposite. [ABSTRACT FROM AUTHOR]
Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:The production of polymer nanocomposites from solution consists of the mixing of the polymer and nanoparticle in solution and subsequent evaporation of the solvent. We examine the formation of polyacrylonitrile and C 60 fullerene nanocomposites, with a focus on monitoring these two steps. The results of this study indicate that the nanoparticles are individually dispersed with the polymer chains in solution prior to deposition and in the final film. As the solution becomes more concentrated, the nanoparticles are sequestered to the outer edges of the polymer crystals, altering the detected crystal structure. The self-assembled structure of the crystalline polymer is directed by the addition of C 60 and manifests itself as a peak in small-angle X-ray scattering on a length scale of ∼150 Å. The results suggest that the non-covalent molecular interactions between C 60 and polyacrylonitrile matrix are sufficiently strong to alter the self-assembled morphology of the polymer and the meso- and nanoscale structures in the nanocomposite. [ABSTRACT FROM AUTHOR]
ISSN:00323861
DOI:10.1016/j.polymer.2015.08.028